1 files changed, 4 insertions, 4 deletions

diff --git a/drivers/mtd/mtdchar.c b/drivers/mtd/mtdchar.c
index a75d55577e49..b20625475132 100644
--- a/drivers/mtd/mtdchar.c
+++ b/drivers/mtd/mtdchar.c
@@ -410,7 +410,7 @@ static int mtd_do_writeoob(struct file *file, struct mtd_info *mtd,
                 return ret;
 
         ops.ooblen = length;
-        ops.ooboffs = start & (mtd->oobsize - 1);
+        ops.ooboffs = start & (mtd->writesize - 1);
         ops.datbuf = NULL;
         ops.mode = MTD_OOB_PLACE;
 
@@ -421,7 +421,7 @@ static int mtd_do_writeoob(struct file *file, struct mtd_info *mtd,
         if (IS_ERR(ops.oobbuf))
                 return PTR_ERR(ops.oobbuf);
 
-        start &= ~((uint64_t)mtd->oobsize - 1);
+        start &= ~((uint64_t)mtd->writesize - 1);
         ret = mtd->write_oob(mtd, start, &ops);
 
         if (ops.oobretlen > 0xFFFFFFFFU)
@@ -452,7 +452,7 @@ static int mtd_do_readoob(struct mtd_info *mtd, uint64_t start,
                 return ret;
 
         ops.ooblen = length;
-        ops.ooboffs = start & (mtd->oobsize - 1);
+        ops.ooboffs = start & (mtd->writesize - 1);
         ops.datbuf = NULL;
         ops.mode = MTD_OOB_PLACE;
 
@@ -463,7 +463,7 @@ static int mtd_do_readoob(struct mtd_info *mtd, uint64_t start,
         if (!ops.oobbuf)
                 return -ENOMEM;
 
-        start &= ~((uint64_t)mtd->oobsize - 1);
+        start &= ~((uint64_t)mtd->writesize - 1);
         ret = mtd->read_oob(mtd, start, &ops);
 
         if (put_user(ops.oobretlen, retp))